Guys,
Thanks for all the responses
Frederick wrote:
RE: High current on 80. I had a similar problem when I built my
KX1. Do a search on KL7CW and see my post of April 19th
on the Elecraft site.
In the meantime I had decided to take the KX1 out of the housing and fiddle
a bit with the LPF and the 3080 board. I have no idea what I did to fix it
(there were definately no shorts!) but it worked... The waveform went to a
straight sine and current draw normalized. Thanks for your response though
- it makes me feel better to know I'm not the only one who encountered
this. Your description sounds very similar to what I had here.
Aftwerwards, I did the Power Output Mod.
So..... in response to the HAM asking whether all bugs are worked out of
the 3080-module, I'd say: sort of. Most never run into this
high-power-on-80m situation and those that do are able to fix it with a bit
of wiggling ;-)
I can savely say however that the KXB3080 and the Power Output Modification
were the most challenging of the Elecraft experiences I have had. But I've
only built one K2 (with options) and one KX1 (with options) so far. End
result: all gear up and running, even the high-power-on-80 situation didn't
last more than a day.
And for those who are still curious about the KX1's output power:
Power Supply 13,8 V:
3.8 W @ 80m, 850 mA
2.9 W @ 40m, 680 mA
4 W @ 30m, 620 mA
2 W @ 20m, 450 mA
I don't know whether these are typical values, but hey, they're mine.....
Bart de PA3GYU
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